/Engine/Plugins/Online/OnlineSubsystem/Source/Public/Interfaces/OnlinePlayTimeLimit.h
Get the reward amount multiplier for the user Expected to start at 1.0 (full rewards), and is reduced based on their play time
the reward amount multiplier
float GetRewardRate ( const [FUniqueNetId](API\Runtime\CoreOnline\Online\FUniqueNetId) & UserId )